Argon Dashboard Angular is built with over 100 individual components, giving you the freedom of choosing and combining. All components can take variations in color, that you can easily modify using SASS files.

Features
9 types of toast notifications (async, confirm, prompt and more...)
Ability to create toasts in different positions at the same time
Many config options (icons, backdrop, timeout, position and much more)
Custom fully controlled styling including animations
Repository includes 3 different styles. So you can use on of them, or create your own.
Callbacks
Custom HTML
4.3KB minified and gzipped

Nebular is a great toolkit if you build Rich UI web-application based on Angular, and want to bootstrap your development using essential features out of the box. It provides you with a set of native Angular components, themeable components, authentication and security layers easily configurable for your API. At the same time, Nebular allows you to use it together with any other UI library you choose.

Blox Material makes it possible to create beautiful Angular apps with modular and customizable UI components, designed according to the Material Design Guidelines. It integrates Material Components for the Web (a Google project) with the Angular framework.

Project Clarity is an open source design system that brings together UX guidelines, an HTML/CSS framework, and Angular components. This repository includes everything you need to build, customize, test, and deploy Clarity.